| 11. | It is unlikely that the heavy elements were obtained from the interstellar medium.
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| 12. | Astatine's alpha decay energies follow the same trend as for other heavy elements.
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| 13. | From these supernova comes the heavy elements and eventually the planets.
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| 14. | The preferred explanation is that, without heavy elements, only large stars can form.
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| 15. | These burst into supernovae and salted the galaxies with heavy elements.
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| 16. | It erases your brain from whatever heavy elements there are in the record.
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| 17. | The symbol Fl is now used for the super-heavy element flerovium.
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| 18. | It is twice as enriched with heavy elements than the Sun.
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| 19. | Coal also contains traces of toxic heavy elements such as China.
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| 20. | :Theoretically all heavy elements are derived from lighter elements ( see Supernova nucleosynthesis ).
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